Machine for boiling and washing bags foe manufactueing paper



siren srarns Parana onirica GEO. SPOFFORD, OF WINDHAM, CONNECTICUT.

MACHINE FOR ,BOILIN Gr AND WASHING RAGS FOR MANUFACTURING PAPER.

v.Sipecication Vforming; part of vllietters Patent No. 1,753, dated September 2, 1840; yReissued. June V11, 14850, No.. 171.

To all whom it may concern.'

Be it known that I, GEORGE Srorrono, of

lVindham, in the county of lVindham and,

State oi' Connecticut, have invented an Improved Boiler .and l/Vasher for Boiling and Paper; and I do hereby decla-re that ,the ollowing is a full and eXact description thereof.

In my improved boiler vand washer the rags are to be subjected alternately to the influence of high pressure steamand an alkaline liquid; said'boiler being so .construct- `ed as to be capable of being made Vto revolve upon its axes, which are formed hollow, for the purpose of introducing steam from a separate, or `ordinary steam engine boiler; and also of introducing water, or an alkaline solution, when desired for the purpose of washing the rags which have been boiled.

In the accompanying drawing, A, A, Fig ure 1, is the body of my cylindrical ragboiler and washer one of its heads, Fig. 2, being removed for the purpose of showing its interior.

B, B, are partitions, formed of metallic bars, or grating, by which the interior is divided into four compartments, that are connected with each other by the openings through the grated partitions.

C, C, O, C, are man-holes, similar to those ordinarily made in steam engine boilers, there being` one of these for each compartment; their main use being to admit and remove the rags to be acted upon; they are to be secured in the usual manner.

D, Fig. 2, is one of the boiler heads, which is to be secured in place in the ordinary way; it is represented as having a rim E, which may be ten, or twelve, inches deep, more or less, and is to reach to the partitions B, B, in the boiler and washer; at the inner end of this rim there is a strong, reticulated wire, or other grating, as shown at Fig. 3, which grating, when the head is in place, forms one end of the four compartments into which the boiler is divided. (I

-usually make this grating of No. 14 wire.)

F is one of the hollow gudgeons upon which the boiler is to revolve, there being a similar gudgeon at the opposite end.

G, Gr, are cocks, of which there may be one to each compartment, for the purpose of drawing oli the contained liquid,

H, H, are cogs `on the head of the boiler, into which cogs a pinion may mesh, for the purpose of causing it to revolve; motion made sufliciently sti'ong to bear a pressure of a hundred pounds, or more, to the square inch. One of this size will hold, as a proper charge, about 1,300 lbs. of rags, 4and to these should be added about 100 gallons of alkaline ley, say, zpotash, or sode, and water,

ylime `Water, &c. v

When the boiling is to be eiected, the boiler is yto be made to revolve at the rate of labout live times in a minute; steam of a pressure of from 50 to 100 lbs. per square .inch being admitted; and the boiling is to be continued for a length of time which will differ according to the nature of the stock; say from twelve to twenty four hours, more or less. After the rags have been sufliciently boiled in this way, they may be washed in the same machine, water being admitted, and drawn off, at proper intervals for that purpose. machine for washing, which I make of wood, constructing it in a form and manner generally similar to those of my rag boiler and washer, as by this means the boiler may be continuously used for boiling only, and a quantity of stock be prepared in it suiiicient for a large establishment. I prefer to make my washing cylinder, when used sep arately, shorter, but of greater diameter than the above described boiler; say siX feet long and seven feet in diameter. It is made to revolve on gudgeons, and I divide the interior into four, or any other preferred number of, compartments by means of partitions, which may be of wood, consisting of open rails, or bars, covered with coarse wire. Each of these compartments has an opening into it, like a man-hole, closed by a stopper, which may be removed at pleasure.

About four hundred pounds of boiled rags will be a suilicient charge for this machine. Provision must, of course, be made for admitting and drawing otl'l the water; and in using it about twenty four revolutions in a minute will be a proper speed tov be given to it; it is t0 be driven in the manner But I usually employ a separate of the boiler; Which it so closely resembles, as will be manifest Vfrom the foregoing description, that I have not deemed it necessary to represent it in a drawing, as this Would have been little else than a repetition of the boiler.

`By the aid of this apparatus Vwhat inthe old way of proceeding is a mosttroublesome and offensive operation, is performed With alkaline liquor; steamis introduced through tubes inserted below' a false bottom, and, a cover being fitted on, the rags are boiled from 12 to 24 hours; they are then put into the machine and'beaten up' into pulp, during, and by, which operation .they `are Washed; but in this Way a very large'portion of the material is Wasted. When the rags are to be gas bleached, they are beaten into half stulf in the'machine, are removed thence, gas bleached, and returned to the machine; still requiring a troublesome manipulation, andlsubjecting the manufacturer to a very heavy' lossV of material.

By my process of boilingV under heavy steam pressure, or at. ahigh temperature, the vegetable oil, and other injurious Inat-v ters Which are removable bythe conjoint action of high steam and ahighly heated [FIRST PRiivTnD 1913.]

alkaline solution, are more effectually and rapidly removed than has heretofore been eected; stock of an inferior quality is rendered ft for making paper much superior to that for Which it `canbe `used When boiled and `treated inthe ordinary Way; the Washing isv more rapidly and perfectly performed, and being effected before it is put into the machine, the great loss resulting 4from the ordinary process is entirely prevented.

Iavingthusfully described the nature of the apparatus used by me for boiling and for Washing rags for the manufacture of of `using it, and briefly, set forth the benefits derived therefrom, What I claim asV constituting my invention, Vand desire t0 secure by Letters Patent, is-' paper, and having also described the mode The construction and use of a cylindrical,

revolving -boilerand Washer the interior of which isdivided into four, or any other convenient number of compartments bygrated partitions, Withintvhich `the rags are to be subjected to the `action' of high steam and of an alkaline solution, in the manner, and

`for the purpose, herein set forth, the Whole being constructed and operating substantially in the manner described.

. GEORGE SPOFFORD.

THOMAS GRAY, SAML. BrNGI-IAM. 

